Prosthesis Delivery Control Wire Segmentation for Jam Prevention
Find Innovative SolutionsGenerate Solutions
Solution Overview
Problem
Existing minimally invasive surgery delivery apparatuses face issues with control wires jamming on components or organs due to the bump of the control wire running out of the connecting shaft in the wrong direction, increasing surgical risk.
Innovation Solution
A prosthesis system with a delivery apparatus featuring a preset channel in the connecting shaft or base that constrains and accommodates control wire segments, allowing safe adjustment of the prosthesis and easy separation during implantation, reducing the risk of jamming.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Ease of operation
If the control wire is allowed to move freely through the connecting shaft, then the operator can easily adjust the prosthesis state, but the bump of the control wire may run out of the connecting shaft in the wrong direction causing jamming and increasing surgical risk
Solution Approach 1:
The control wire is divided into multiple segments with different sizes. The second segment has a smaller size that allows it to pass through the preset channel, while the first and third segments have larger sizes that prevent them from exiting the connecting shaft in the wrong direction. This segmentation resolves the contradiction by allowing controlled movement during adjustment while preventing harmful exit during operation.
Solution Approach 2:
The preset channel acts as an intermediary structure between the control wire and the connecting shaft. It guides the second segment of the control wire through the connecting shaft in a controlled manner, allowing the bump to exit in the correct direction for adjustment while preventing exit in the wrong direction. This intermediary structure resolves the contradiction by providing a safe passage way.
2Reliability
If the control wire bump is restricted within the connecting shaft, then jamming is prevented, but the control wire cannot be properly adjusted
Solution Approach 1:
The control wire is segmented into multiple portions with different diameters. The second segment has a smaller diameter that allows it to pass through the preset channel for adjustment, while the first and third segments have larger diameters that are restricted by the connecting shaft structure. This segmentation enables both adjustment capability and jamming prevention simultaneously.
Solution Approach 2:
Different segments of the control wire have different local properties (diameters). The second segment has a smaller diameter locally to allow passage through the preset channel, while the first and third segments have larger diameters locally to be restricted by the connecting shaft. This local quality differentiation resolves the contradiction by allowing selective movement at different locations along the control wire.
3Reliability
If a preset channel is added to constrain the control wire, then surgical safety is improved, but the device complexity increases
Solution Approach 1:
The preset channel is merged with the existing connecting shaft structure rather than being a separate component. The preset channel is formed as an integral part of the connecting shaft, combining the guidance function with the existing structural element. This merging approach resolves the contradiction by adding safety functionality without proportionally increasing device complexity.
Solution Approach 2:
The connecting shaft serves multiple functions: it provides structural support for the delivery apparatus, guides the control wire through the body, and contains the preset channel to constrain the control wire bump. This multi-functionality reduces the need for additional separate components, thereby resolving the contradiction between safety improvement and complexity increase.
Data Source
Figure 1~2
Figure 3~5
Figure 6~8
AI summary
Provided is a prosthesis system. The prosthesis system includes a delivery apparatus (100) and a prosthesis. The delivery apparatus (100) includes a connecting shaft (110) and a control wire (120). The prosthesis includes a base (210) and a first movable component. A preset channel (300) is provided in at least one of the connecting shaft (110) and the base (210). The control wire (120) includes a first segment (121), a second segment (122) and a third segment (123) connected successively. At least a part of each of the first segment (121) and the third segment (123) connected to the second segment (122) has a size larger than a size of the second segment (122). The second segment (122) is accommodatable within the preset channel (300). In response to the preset channel (300) being in the first state, the first segment (121) and the third segment (123) are configured to cause the second segment (122) to be constrained within the preset channel (300), and in response to the preset channel (300) being in the second state, the control wire (120) is separable from the preset channel (300). In the prosthesis system and delivery apparatus in the embodiments of the present disclosure, the movable component of the prosthesis can be safely and reliably adjusted by the delivery apparatus (100), thereby reducing the surgical risk.